hello sanjoy,

please follow the step and instruction :

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

• Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
• "Remove Cookies" from sites causing problems:

• Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"
• Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance

• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:

• https://support.mozilla.org/kb/Server+not+found
• https://support.mozilla.org/kb/Firewalls
• https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

I hope to resolve your problem then reply me back.

Thank you!

Hi, sanjoy. 14d Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" "Remove Cookies" from sites causing problems:

Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies" Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance Do NOT click the Reset button on the Safe Mode start window https://support.mozilla.org/kb/Safe+Mode https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:

https://support.mozilla.org/kb/Server+not+found https://support.mozilla.org/kb/Firewalls https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

Clear the cache and remove cookies only from websites that cause problems.

"Clear the Cache":

   Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now" 

"Remove Cookies" from sites causing problems:

   Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies" 

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

   Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
   Do NOT click the Reset button on the Safe Mode start window 

   https://support.mozilla.org/kb/Safe+Mode
   https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes 

It is possible that your security software (firewall, anti-virus) blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.

Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full, unrestricted, access to install for Firefox and the plugin-container process and the updater process.

See:

   https://support.mozilla.org/kb/Server+not+found
   https://support.mozilla.org/kb/Firewalls 

   https://support.mozilla.org/kb/fix-problems-connecting-websites-after-updating

I am using Firefox 77.0.1. I have not found the following: 1. Firefox/Tools > Options > Advanced > Network

2. Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

heloo sanjoy ,

please follow this link i hope easily resolve your problem:

for specific website is working well:

[https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fi...]

when resolve your problem then reply me back.

Thank you.

Regards,

Arman khan

I tried with the link. But the problem still persists.

ERR_CONNECTION_RESET: how to fix the 101 error in Chrome, etc. ... If you want to access a website with your browser and you receive the message ... Checking the connection; Checking the proxy and the firewall; Running Windows ... For example, if you open the web application with Firefox instead of ..

https://www.ionos.com/digitalguide/hosting/technical-matters/err-connection-reset/

ERR_CONNECTION_RESET: how to fix the 101 error in Chrome, etc. ... If you want to access a website with your browser and you receive the message ... Checking the connection; Checking the proxy and the firewall; Running Windows ... For example, if you open the web application with Firefox instead of .. https://www.ionos.com/digitalguide/hosting/technical-matters/err-connection-reset/

This Message solved my Problem

Hello,

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